Static eliminator



March 21, 1933. P. KLIER STATIC ELIMINATOR Filed sept. 24, 1929 Il IlPatented Mar. 21, 1933 ioFFlicEf srArrc ELIMINATOR Application filedSeptember 24, 1929. Serial No. 394,860.

VThis invention relates ,to static` eliminators for radio receivingsets, and has for one of its objects to provide a device of thischaracter which may be readily connected in the antenna lead, which willfunction etliciently and which will enable the set in connection withwhich it is used to be finally tuned.

combination and arrangement of parts hereinafter fully described andclaimed and il-,l lust-rated in the accompanying drawing wherein l YFigure 1 is a side elevation of the static eliminator;

Figure 2 is a sectional view on an enlarged scale taken on a planeextending longitudinally and centrally through the static elim` inator;

Figure 3 is a sectional view onan enlargedV scale taken on the 3-3 ofFigure 1;

Figure 4 is a similar View taken on the plalne indicated by the line Hof Figure 1, anc Fig. 5 is a diagrammatic View illustrating theconnection between the coilsof the static eliminator.

The static eliminator comprisesan outer tube 1 which is made of copperand ems bodies a lower section 2, an upper section 3, and anintermediate section 4 having itsend portions arranged within the upperand lower sections. The lower portion 2a of the section 2l is of conicalformation and closed plane indicated by the line of the section 3 is ofconical formation and open at its upper end. The section 2 is provided.near the upper end of its conical por- Thel coil 13 extends from thelower to the Aupper end of the section 4, and is connected at its lowerend to the binding screw 6. vThe upper kend of the coil 13extends intothe section 4 through an opening 14 formedin the section, and isinsulated from Said section.

An inner tube 15, which is made from' brass, is arranged within the tubesection 4, The invention consists in the construction,

and is provided with inner and outer' insu- 'and 17 thereof. The lowerend of the coil 18 is connected to the upper end of the coil 13 iatingjackets 16 and 17, respectively. AF60 [closely wound coil 18 isarranged'upon the by a lead 19, and the upper end of thecoil 65 184 issoldered within'an opening 20 formed in the upper end of the tube 15, asclearly shown in yFig'. 5. j Y

A plug 21, which is provided with anin- 'sulating jacket 22 made ofrubber, has the lower portion thereof arranged within the upper endportion of the tube 15,.V The upper .end of the plug` 21 isreduced andclosed and provided with anopening 23 in whichone 7 end Vof a lead 24isl soldered. The lead 24 extends through the open upper end of the tubesection 3 to thereceiving set. The antenna and receiving setbeingdiagrammatically illustrated and designatedA 2 5 and 26,-

respectively. The lower end of the'plug 21 isy open, and the plug isprovided near said endthereof with an'opening 27. A conductor 28'iscentered at one end within the opening.

27, and has its other end soldered tothe inner `side of the tube 15'. atits lower end, and the upper portion 3a The tube 15 is provided nearitslower end waxed paper. A bundle of wires 3 0 have their upper endportions arranged within the tube 15 and below the partition 29, andarranged upon the lower projecting end por- .with a partition 29 whichisv made from tions thereof is a cap 31 which is made-of Y brass and hasits lower end closed'by a plug 32made of waxed paper. The c ap 31 isprovided with an insulating jacket 33 made of tape, and an rinsulatinggasket `34 made of rubber is arrangedbetween the adjacent ends of thetube 15 andV cap. The cap 31 is provided between the lower end of thewires 30 and its plug 32 With a mixture and hard oil Which is designated35.

The outer tube 1 and the inner tube 15, together With the interveninginsulation 16 and 17, constitute a condenser. The outer coil 13 is aloading coil, and is connected at its lower end to the aerial lead 7 andthe outer tube 1 of the Condenser. is a radio frequency choke coil, hasits lower end connected to the upper end ofthe loading coil 13 by thelead19, and has its upper end connected to the inner tube 15 ofthecondenser. This tube of the condenser is con-A nected to thereceiving set by the lead 24. The Wires 30 constitute a core for theradio frequency choke coil 18,7and the cap or 'reassist thelaggingaction of the radio frequency choke coil. This device has beensubtuning of a'radio receiving set, and also functions to prevent staticfrom'reaching the The inner coil 18.

of sawdust connected to an antenna, a shield about the outer coil, andan iron core Within the inner member, said core being shorter in lengththan the inner member and having a portion thereof. extending beyond oneend of the inner member.

In testimony whereof I hereunto affix my signature.

PETE KLIER.

-ceptacle 31, together With the oil saturated sawdust 35 therein andcontacting with the "core, constitutes means which functions toreceiving set. The manner in which the de-iV i 'vice functions to obtainthese ends is not understood by applicant.

IVhile I have described the principle of the linvention together Withthe structure V- Which I now consider the preferred embodimentthereof,it is to be understood that the structure shown is merely illustrativeand that such changes may beV made, when desired, as fall Within thescope of the inven-v tion* as claimed.

I claim:--

1. A static eliminator comprising an inner and an outer tubular memberof metallic composition, aninner coil about the inner member, one end ofthe inner coil being adapted to be connected to a radio'receiving set,an outer coil about the outer member, one end of the outer-'coil beingadapted to be connected to an antenna, a shield about the outer coil,and an iron core Within the inner memf ber. y

2. A static eliminator comprising Van' inner and an outer tubularmemberV of metallic composition, an inner coil about the inner member,one end of the inner coil being adapted to be connected yto aradioreceiving Set, an outer coil about the outer member, one end of theouter coil being adapted to be connected to an antenna, a shield aboutthe outer coil, and an iron core Within the inner member and having aportion thereof extending beyond one end ofthe inner member.

3. A static eliminator comprising an inner and an outer tubular memberof metallic composition, an inner coil about the inner member, one endof-the inner coil being adapted to be connected to a radio receivingset, an outer coil aboutrthe outer member,

one end of the outercoil being adapted to be

